Cinematographic or like film



H. KUYPERS I CINEMATOGRAPHIC 0R LIKE FILM Jun 29 1926.

Filed Feb. 9, 1914 4 a I l JV; [roceZZa Zosc z n v i 152 225 iiizgd enzalsiozz b 492- am on Patented June 29, 1926.

UNITED STATES PATENT OFFICE.

1131mm xurrsas, orivmux "nmu, lmvnas, nnnoruu, ass'renoa 'ro csvaaa'r rnoro raonuc'rsm n. v., or owns-eon, mum m'rwnnr, BELGIUM.

OINEKATOGRAPHTC OB LIKE FILE.-

Application med February a, 1914, semi no. smear, and in Belgium April 14', 1918.

This invention relates to improvements in cinematographic and like films.

The object of the invention is to produce a film of this character which will not be electrified b the friction of the film a ainst the end rol ers of the apparatus whi e the film is in .use. a

Cinematogra hic films are formed from a stri of cellulo1d,.one side of which is coated 1 wit a layer ofsensitized gelatine, while the other side is uncoated. Celluloid being a readily electrified" substance, the slightest friction between the unsensitized side of the film and the surface over which it is moved 1-5 will sufiice .to produce electric discharges,"

and the luminosity of these discharges affects the sensitive layer and not infrequently renders the film useless.

The" accompanying drawing represents a perspective view of a film constructed in accordance with this invention.

The film constituting this invention eliminates the drawback above referred to by reventing'any friction between the cellu- 85 oid film proper and the apparatus. This result is o tized side of the transparent, flexible .support or film 1' with a layer 2 of any suitable substance which is not readily electrified by 80 friction,the other side thereof being covered by the usual sensitized elatine layer 3. The exposed or bare side 0 the film is covered by a thin layer or coatin of suitable substance which is no rea ily electrified by friction and which 1s also soluble in water at low temperatures oriin the baths used for developmi. This layer ma be formed for example y covering the are side of the film with a five per cent solution of dextrin or a suitable solution of other gumtained by covering the non-sensi-- .double function of preventing electrifying of the films by fr1ction and scrat-c ing thereof. It is an exposed, wear-taking coating and is disposed next adjacent to and ginintimate contact with the surface of the I claimas my inventions-w 1. As an article of manufacture, a photographic film strip, embodying a transparent flexible support-having a sensitized coating on its face and an exposed, weartaking coating or layer of a gum-like substance on it's-reverse side, soluble in water at low temperatures, and disposed next adjacentito and in-intimate contact with the surface of the support.

2. As an article of manufacture, a photoaphic film strip embodying a transparent e'xlble support made of a material-that will friction readily create static electrical c ar es and having a sensitized coating on one ace and on its'reverse face and in in-- timate contact therewith, an exposed, weartaking coatin or layer of a substance which .is soluble in t e developing baths and is effective to prevent the frictional electrification of the support.

.In testimony whereof I afiix my signature.

' HENDRIK'. KUYPERS. 

